Congestive heart failure is a serious health problem in the United States and is associated with excessive morbidity and mortality. Several classes of medications have been shown to improve mortality in patients with CHF. Despite this these medications are widely under prescribed. Guidelines have been shown to improve patient outcomes and several guidelines on the management of CHF have been published. Implementation of guidelines is challenging and most strategies have focused on changing physician behavior. Patient-based interventions have been shown to be effective in implementing guidelines on CHF but they have been very labor intensive. A computer based intervention to implement CHF guidelines, if effective, would be beneficial.